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Homework Help: Kinetic Friction Coefficient

  1. Jan 8, 2009 #1
    1. The problem statement, all variables and given/known data
    A 0.5kg puck on a frozen pond is given an initial speed of 20m/s. If the puck always remains on the ice and slides 115m before coming to rest, determine the coefficient of kinetic friction between the puck and ice.

    2. Relevant equations
    mass= 0.5kg
    force of gravity= mass x gravity = (0.5)(9.8)= 4.9N
    displacement= 115m
    V1= 20m/s
    V2= 0m/s
    uk= ?

    3. The attempt at a solution

    I have no idea where to start.
  2. jcsd
  3. Jan 8, 2009 #2


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    Homework Helper

    You need three more equations: one kinematic equation, one force relation, and one fundamental law of physics.
  4. Jan 8, 2009 #3
    I don't understand, could you elaborate a little please ?
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